Liu An bfc84ba95b
Test: handle duplicate names by appending "(1)" (#11244)
### What problem does this PR solve?

- Updated tests to reflect new behavior of handling duplicate dataset
names
- Instead of returning an error, the system now appends "(1)" to
duplicate names
- This problem was introduced by PR #10960

### Type of change

- [x] Testcase update
2025-11-13 15:18:32 +08:00
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